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Arturo Pomar Salamanca vs Efim Geller
Stockholm Interzonal (1962), Stockholm SWE, rd 19, Feb-27
King's Indian Defense: Four Pawns Attack. Exchange Variation (E79)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Oct-09-15  gabriel112000: I guessed this quite easily.
Oct-09-15  M.Hassan: "Difficult"
White to play 20.?
Sides are equal

20.f5!

A) 20............gxf5
21.Qg5+ Kh8
22.Qf6#

B) 20............Qxe4
21.f6+ Kh8
22.Qh6 threatening mate on g7 Rg8
23.Rf4 Qe5
24.Rh4 to mate on h7 Qh5
25.Rxh5 gxh5
26.Qxh5 Nxe7
27.fxe7
White is stronger at this point and should win.
Time to check

Oct-09-15
Premium Chessgames Member
  al wazir: I found the first three moves, but then the complications multiply. Black has alternatives like 24...Rg6, 26...dxe5, and 29...Rg8. They all lose, but seeing that ahead of time is part of the solution.
Oct-09-15
Premium Chessgames Member
  morfishine: <20.f5> yadda, yadda, yadda
Oct-09-15
Premium Chessgames Member
  Check It Out: I saw 20.f5 all the way through to 23. Rf3, but 23...g5 surprised me. Agree with <capablancakarpov>'s comment from many years ago.
Oct-09-15
Premium Chessgames Member
  gofer: <20 f5 ...>

20 ... g5
21 Qxg5+ Kh8
22 Qf6#

20 ... gxf5
21 Qg5+ Kh8
22 Qf6+ Kg8
23 Nxf5+ mating

20 ... Nxe7
21 f6+ Kh8 (Kg8 Qh6 mating)
22 fxe7 Re8
23 Qxd6

20 ... Qxe4
21 f6+ Kh8
22 Re1 Qh4
23 Qxd6

<20 ... f6>

I think this the most robust defence and I am struggling to see a clear win from here for white...

21 fxg6 Nxe7
22 gxh7 Ng6

looks complex

...perhaps white's best is...

<21 Nxc6 Qxc6>
<22 Rac1 ...>

Hoping for Qxe4 which loses quickly...

<22 ... Qb6>
<23 Rc3 ...>


click for larger view

~~~

Hmmm, don't like this POTD at all!!!!

Oct-09-15
Premium Chessgames Member
  diagonalley: ugh! ... <diagonalley> nul points :-(
Oct-09-15  wooden nickel: 20.f5 is certainly a good move, however 20... f6 defends... I wonder why Geller didn't go for that line?!
Oct-09-15  The Kings Domain: Puzzles are nice, especially when you get them. :-) Smooth combination by white, such executions are a balm to the soul (heh).
Oct-09-15  Monocle: I saw 20. f5, but I couldn't see anything great after 20... f6. White doesn't seem to have much more than a small advantage.

<dfcx: If black refuses the knight, for example 20...f6 21.fxg6 hxg6 22.Qxd6 and is a pawn ahead.>

20.f5 f6 21.fxg6 Nxe7.

Oct-09-15
Premium Chessgames Member
  kevin86: This attack will end in mate.
Oct-09-15  saturn2: I had f5 and calculated more on blacks answer f6 than on Nxe7 the second resulting in a dangerous attack after king and night are forked by whites f6 Ok white wins a pawn in the first variation, but does not white also win a pawn if he plays Qxd6 right away?
Oct-09-15  StevieB: What was wrong with 24.Rh3?
Oct-09-15  framsey: I'm confused. I saw 20.f5, but then didn't see how to proceed after 20...f6. That seems to give white an edge, but not the clear winning advantage you expect from a tactics puzzle.

Stockfish agrees and calls that line +0.86.

Oct-09-15  psmith: I am with the others who saw f5 but no clear follow-up to f6.
Oct-09-15
Premium Chessgames Member
  Marmot PFL: Was looking for a forced line so I didn't consider 20 f5 much. Can't black just decline with 20...f6?
Oct-09-15
Premium Chessgames Member
  Marmot PFL: For example 20 f5 f6 21 Qxd6 Rad8 22 Qa3 Qxe4 (or 22...Rd3)
Oct-09-15  amer.alhabsi: 24. .. Qe6 (instead of Re8) forces the exchange of queens and relieve the pressure.
Oct-09-15  hcgflynn: <amer.alhabsi>true, though i think after the queen exchange white plays rf7 and raf1 and then it is hopeless too.
Oct-09-15  PJs Studio: I was so caught up with 20...f6 as a reply o couldn't figure it out. After I saw Gellers choice of 20...Nxe7 I found most of whites moves.

I could believe he didn't play 20...f6!

Oct-09-15  TimothyLucasJaeger: I discarded 20. f5 because of 20. ... f6 and pretty much gave up.

Over the board i think i would have played 20. Rc1 in an effort to activate my rooks if white should respond 20. ... Qxe4 21. Re1, or take over the dark squares after 20. ... Qxa2 21. Qxd6 Qxb2 22. e5

Oct-10-15  PJs Studio: I COULDN'T believe he didn't play 20...f6!
May-31-16  cunctatorg: From the chess.com site, 5/31/2016: "Alexander Kotov famously said: "If Pomar had been born in the Soviet Union, he would have been a World Championship contender." "
May-31-16  RookFile: The 4 pawns is a good way to play against the King's Indian. White gets to have the initiative, rather than grab a pawn on a7 and hope to survive black's kingside counterattack.
Sep-16-17  Eduardo Bermudez: Pretty good game by Pomar !
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